reduce the number of lines in a polyline More...
#include <vtkDecimatePolylineFilter.h>
Public Member Functions | |
| virtual void | SetTargetReduction (double) |
| virtual double | GetTargetReduction () |
Static Public Member Functions | |
| static vtkDecimatePolylineFilter * | New () |
Protected Member Functions | |
| vtkDecimatePolylineFilter () | |
| ~vtkDecimatePolylineFilter () | |
| int | RequestData (vtkInformation *, vtkInformationVector **, vtkInformationVector *) |
| double | ComputeError (vtkPolyData *input, int prev, int id, int next) |
| void | UpdateError (vtkPolyData *input, int iId) |
| int | GetPrev (int iId) |
| int | GetNext (int iId) |
Protected Attributes | |
| vtkDecimatePolylineVertexErrorSTLMap * | ErrorMap |
| vtkSmartPointer< vtkPriorityQueue > | PriorityQueue |
| bool | Closed |
| double | TargetReduction |
| typedef vtkPolyDataAlgorithm | Superclass |
| static int | IsTypeOf (const char *type) |
| static vtkDecimatePolylineFilter * | SafeDownCast (vtkObjectBase *o) |
| virtual int | IsA (const char *type) |
| vtkDecimatePolylineFilter * | NewInstance () const |
| void | PrintSelf (ostream &os, vtkIndent indent) |
| virtual vtkObjectBase * | NewInstanceInternal () const |
Detailed Description
reduce the number of lines in a polyline
vtkDecimatePolylineFilter is a filter to reduce the number of lines in a polyline. The algorithm functions by evaluating an error metric for each vertex (i.e., the distance of the vertex to a line defined from the two vertices on either side of the vertex). Then, these vertices are placed into a priority queue, and those with larger errors are deleted first. The decimation continues until the target reduction is reached.
- Warning:
- This algorithm is a very simple implementation that overlooks some potential complexities. First, if a vertex is multiply connected, meaning that it is used by multiple polylines, then the extra topological constraints are ignored. Second, the error is not updated as vertices are deleted (similar to iteratively computing a quadric error metric). Thus, once calculated, the error is used to determine which vertices are removed. This can produce less than optimal results.
- See also:
- vtkDecimate vtkDecimateProp vtkQuadricClustering vtkQuadricDecimation
Definition at line 52 of file vtkDecimatePolylineFilter.h.
Member Typedef Documentation
Standard methods for type information and printing.
Reimplemented from vtkPolyDataAlgorithm.
Definition at line 57 of file vtkDecimatePolylineFilter.h.
Constructor & Destructor Documentation
| vtkDecimatePolylineFilter::vtkDecimatePolylineFilter | ( | ) | [protected] |
| vtkDecimatePolylineFilter::~vtkDecimatePolylineFilter | ( | ) | [protected] |
Member Function Documentation
| static int vtkDecimatePolylineFilter::IsTypeOf | ( | const char * | type | ) | [static] |
Standard methods for type information and printing.
Reimplemented from vtkPolyDataAlgorithm.
| virtual int vtkDecimatePolylineFilter::IsA | ( | const char * | type | ) | [virtual] |
Standard methods for type information and printing.
Reimplemented from vtkPolyDataAlgorithm.
| static vtkDecimatePolylineFilter* vtkDecimatePolylineFilter::SafeDownCast | ( | vtkObjectBase * | o | ) | [static] |
Standard methods for type information and printing.
Reimplemented from vtkPolyDataAlgorithm.
| virtual vtkObjectBase* vtkDecimatePolylineFilter::NewInstanceInternal | ( | ) | const [protected, virtual] |
Standard methods for type information and printing.
Reimplemented from vtkPolyDataAlgorithm.
Standard methods for type information and printing.
Reimplemented from vtkPolyDataAlgorithm.
| void vtkDecimatePolylineFilter::PrintSelf | ( | ostream & | os, |
| vtkIndent | indent | ||
| ) | [virtual] |
Standard methods for type information and printing.
Reimplemented from vtkPolyDataAlgorithm.
| static vtkDecimatePolylineFilter* vtkDecimatePolylineFilter::New | ( | ) | [static] |
Instantiate this object with a target reduction of 0.90.
Reimplemented from vtkPolyDataAlgorithm.
| virtual void vtkDecimatePolylineFilter::SetTargetReduction | ( | double | ) | [virtual] |
Specify the desired reduction in the total number of polygons (e.g., if TargetReduction is set to 0.9, this filter will try to reduce the data set to 10% of its original size).
| virtual double vtkDecimatePolylineFilter::GetTargetReduction | ( | ) | [virtual] |
Specify the desired reduction in the total number of polygons (e.g., if TargetReduction is set to 0.9, this filter will try to reduce the data set to 10% of its original size).
| int vtkDecimatePolylineFilter::RequestData | ( | vtkInformation * | request, |
| vtkInformationVector ** | inputVector, | ||
| vtkInformationVector * | outputVector | ||
| ) | [protected, virtual] |
This is called by the superclass. This is the method you should override.
Reimplemented from vtkPolyDataAlgorithm.
| double vtkDecimatePolylineFilter::ComputeError | ( | vtkPolyData * | input, |
| int | prev, | ||
| int | id, | ||
| int | next | ||
| ) | [protected] |
| void vtkDecimatePolylineFilter::UpdateError | ( | vtkPolyData * | input, |
| int | iId | ||
| ) | [protected] |
| int vtkDecimatePolylineFilter::GetPrev | ( | int | iId | ) | [protected] |
| int vtkDecimatePolylineFilter::GetNext | ( | int | iId | ) | [protected] |
Member Data Documentation
vtkDecimatePolylineVertexErrorSTLMap* vtkDecimatePolylineFilter::ErrorMap [protected] |
Definition at line 84 of file vtkDecimatePolylineFilter.h.
Definition at line 87 of file vtkDecimatePolylineFilter.h.
bool vtkDecimatePolylineFilter::Closed [protected] |
Definition at line 88 of file vtkDecimatePolylineFilter.h.
double vtkDecimatePolylineFilter::TargetReduction [protected] |
Definition at line 89 of file vtkDecimatePolylineFilter.h.
The documentation for this class was generated from the following file:
- dox/Filters/Core/vtkDecimatePolylineFilter.h
